Grate raw potato into a bowl.,Turn out onto a cloth and wring, catching liquid.,______,Pour off the fluid and scrape out the starch.,Mix with grated and mashed potatoes.,Sieve the dry ingredients and mix in along with the melted butter.,Add a little milk if necessary to make a pliable dough.,Knead lightly on floured surface.,Divide into 4 parts and form large flat cakes. Mark each into quarters, but do not cut through and bake on griddle.